1 files changed, 127 insertions, 0 deletions
diff --git a/components/slice-analysis-ms/src/main/java/org/onap/slice/analysis/ms/controller/ConfigFetchFromCbs.java b/components/slice-analysis-ms/src/main/java/org/onap/slice/analysis/ms/controller/ConfigFetchFromCbs.java
new file mode 100644
index 00000000..e8e4e11b
--- /dev/null
+++ b/components/slice-analysis-ms/src/main/java/org/onap/slice/analysis/ms/controller/ConfigFetchFromCbs.java
@@ -0,0 +1,127 @@
+/*******************************************************************************
+ *  ============LICENSE_START=======================================================
+ *  slice-analysis-ms
+ *  ================================================================================
+ *   Copyright (C) 2020 Wipro Limited.
+ *   ==============================================================================
+ *     Licensed under the Apache License, Version 2.0 (the "License");
+ *     you may not use this file except in compliance with the License.
+ *     You may obtain a copy of the License at
+ *
+ *          http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *     Unless required by applicable law or agreed to in writing, software
+ *     distributed under the License is distributed on an "AS IS" BASIS,
+ *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *     See the License for the specific language governing permissions and
+ *     limitations under the License.
+ *     ============LICENSE_END=========================================================
+ *
+ *******************************************************************************/
+
+package org.onap.slice.analysis.ms.controller;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonObject;
+import com.google.gson.reflect.TypeToken;
+
+import java.lang.reflect.Type;
+import java.time.Duration;
+import java.util.Map;
+
+import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsClientFactory;
+import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsRequests;
+import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.CbsRequest;
+import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.EnvProperties;
+import org.onap.dcaegen2.services.sdk.rest.services.model.logging.RequestDiagnosticContext;
+import org.onap.slice.analysis.ms.beans.ConfigPolicy;
+import org.onap.slice.analysis.ms.beans.Configuration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import reactor.core.Disposable;
+
+/**
+ * This class provides method to fetch application Configuration
+ * from CBS
+ */
+public class ConfigFetchFromCbs implements Runnable {
+
+    private static Logger log = LoggerFactory.getLogger(ConfigFetchFromCbs.class);
+
+    private Duration interval;
+
+    public ConfigFetchFromCbs() {
+
+    }
+
+    public ConfigFetchFromCbs(Duration interval) {
+        this.interval = interval;
+    }
+
+    /**
+     * Gets app config from CBS.
+     */
+    private Disposable getAppConfig() {
+
+        // Generate RequestID and InvocationID which will be used when logging and in
+        // HTTP requests
+        log.info("getAppconfig start ..");
+        RequestDiagnosticContext diagnosticContext = RequestDiagnosticContext.create();
+        // Read necessary properties from the environment
+        final EnvProperties env = EnvProperties.fromEnvironment();
+        log.debug("environments {}", env);
+        ConfigPolicy configPolicy = ConfigPolicy.getInstance();
+
+        // Polling properties
+        final Duration initialDelay = Duration.ofSeconds(5);
+        final Duration period = interval;
+
+        // Create the client and use it to get the configuration
+        final CbsRequest request = CbsRequests.getAll(diagnosticContext);
+        return CbsClientFactory.createCbsClient(env)
+                .flatMapMany(cbsClient -> cbsClient.updates(request, initialDelay, period)).subscribe(jsonObject -> {
+                    log.info("configuration and policy from CBS {}", jsonObject);
+                    JsonObject config = jsonObject.getAsJsonObject("config");
+                    Duration newPeriod = Duration.ofSeconds(config.get("cbsPollingInterval").getAsInt());
+                    if (!newPeriod.equals(period)) {
+                        interval = newPeriod;
+                        synchronized (this) {
+                            this.notifyAll();
+                        }
+
+                    }
+                    Configuration.getInstance().updateConfigurationFromJsonObject(config);
+
+                    Type mapType = new TypeToken<Map<String, Object>>() {
+                    }.getType();
+                    if (jsonObject.getAsJsonObject("policies") != null) {
+                        JsonObject policyJson = jsonObject.getAsJsonObject("policies").getAsJsonArray("items").get(0)
+                                .getAsJsonObject().getAsJsonObject("config");
+                        Map<String, Object> policy = new Gson().fromJson(policyJson, mapType);
+                        configPolicy.setConfig(policy);
+                        log.info("Config policy {}", configPolicy);
+                    }
+                }, throwable -> log.warn("Ooops", throwable));
+    }
+
+
+
+    @Override
+    public void run() {
+        Boolean done = false;
+        while (!done) {
+            try {
+                Disposable disp = getAppConfig();
+                synchronized (this) {
+                    this.wait();
+                }
+                log.info("Polling interval changed");
+                disp.dispose();
+            } catch (Exception e) {
+                done = true;
+            }
+        }
+    }
+
+}
+\ No newline at end of file